Financial Ledger Platform
Financial Ledgerexpert complexity
Deterministic topology derived from YAML knowledge entities. Nodes represent workloads, datastores, patterns, and risk components. Edges show typed relationships with propagation direction.
12
Components
9
Connections
4
Failure Modes
2
Propagation Paths
Max exposure: high· 2 high-risk nodes in this topology
Topology Graph12 nodes · 9 edges
2 high-risk nodesClick a failure mode below to trace propagation
Workload
Datastore
Cache
Event stream
Pattern
Risk node
Risk path
Failure Propagation Trace
Topology Notes
- ·PostgreSQL primary handles all financial writes. synchronous_commit must be set to at minimum 'on' (durable to local WAL) and ideally 'remote_apply' (durable to at least one replica WAL apply) for regulatory durability guarantees. Never use synchronous_commit = off for financial transactions.
- ·Every financial transaction atomically writes to three tables: the domain command (e.g., payments), the event log (ledger_events), and the outbox. All three writes occur in the same PostgreSQL transaction: no partial commits are acceptable.
- ·The outbox relay reads committed outbox rows via CDC and publishes them to Kafka as domain events. The relay is the single source of truth for downstream event delivery. Its lag is a compliance-adjacent SLA metric: target < 5s under normal load.
- ·Kafka topics receive financial domain events (payment_completed, transfer_debited, transfer_credited). Topic retention must be set to at least 30 days for regulatory replay capability. Topics must be replicated across at least 3 brokers with min.insync.replicas = 2.
- ·PostgreSQL replication must use at least one synchronous standby in the same region. The standby configuration must be validated against the RPO requirement (typically 0 committed transactions lost for financial systems). Failover automation must guarantee no promotion of async standbys for financial write paths.